Fig. 2.

Summary of Health Canada's Canadian Radiological Monitoring Network (CRMN) data available from the Government of Canada's Open Data Portal. All graphs show median concentrations per year of data available (bar charts, colour-coded by substance) with associated guidelines protective of human health (colour-coded by guideline source). Top left –right: The 2021 Fixed Point Surveillance data [35], and the CRMN air data (2010–2021) [47]. Bottom left to right: the CRNM Strontium-90 in milk data (1984–1993 for pan-Canadian sites, and 1994–2020 for Ottawa only) [48], the Total Diet study (2000–2020) [50] and the targeted fish monitoring program on the west coast of BC [62]. Note: Method detection limits were not provided in all studies, therefore non-detects are represented as blanks in this figure. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)